A pack of 20 – 10mm dia x 4mm thick N42 Neodymium Magnets. The NORTH pole is on one circular face and the SOUTH pole is on the opposite face. These Magnets are plated with 3 layers of protective coatings – Nickel + Copper + Nickel (Ni-Cu-Ni). These magnets will have approximately 4100 Gauss on each face. Each magnet can support a steel weight of up to 2kg vertically from the magnetic face when in flush contact with a mild steel surface of equal thickness to the magnet. Each magnet can also support up to 0.4kgs in a shear position before beginning to slide down a steel surface under the same conditions. These magnets can be fixed in place using Araldite/Loctite and have a maximum operating temperature of 80 degrees C.